I work in Credit Control for my company. Its a pain but am glad of the work to be honest.
Calling Calling and more calling is what works in my opinion. Always and I mean Always record every conversation with a customer.
Ex: 08/12 09.08am
Spoke to Jimmy in Accounts
Jimmy said he would do out a cheque for outstanding invoices for the sum of 100e on Friday 11/12 and will post that evening.
Always confirm:
Amount owed with customer
When payment will be done
When payment will be posted.
Record this in every conservation. If customer miss the payment then you can go back to them and state well I spoke to you on the 08/12 and you said you where doing payment on Friday, that was the arrangements you made, you miss that and therefore send on payment this evening as you agreed last week.
Also we allow payment plans to be set up with customers whereby the customers spreads the debt over 4 weeks say with 4 post dated cheques.
Also calling into the customer works as well. If you have reps on the road then they should contact their customers a couple of days in advance stating am due to call next week, "the account is € X have a cheque ready unless there is any queries which I will go through with you then and then afterwards you can settle up the account".
We have a UK operation as well and there is no one over there doing my job because in the UK and European the consenus is you pay your bills on time. OK the manager spends a couple of days ringing the odd customer but nothing to the extent that is required with Irish customers.
I also find you need to be tough with Irish customers and dont be afraid to be tough but polite and professional. Do not swear and threaten people. Irish attitude is attack is the best defensive or igornace is bliss. Dont let this happen. Remind the customer they where the ones who made the arrangements and its their repsonsibility to fulfill it.
Finally, every year you should set out a credit contol bad debt target. "Bad Debts can be no more than 2% of annual sales". There will also be bad debts. Dont lose focus with collecting debts, focus on the business and if your a one man band set aside one day every two weeks to ring customers, record calls, follow up.
Good Luck.